How to remove DyFuCa

DyFuCa – a dangerous malware that can install dubious applications and spy on users' activities

DyFuCa is an adware program which consists of two components: a downloader and a browser helper object^[1] (BHO). Both of these elements get installed without users' knowledge when they access certain websites and allow ActiveX controls to be run. The suspicious program is also capable of redirecting users to sponsored or even dangerous domains, display intrusive advertisements in Google Chrome, Internet Explorer or Mozilla Firefox and even send emails to everybody on the Address Book in the Outlook. Alternatively, the DyFuCa is also known as Internet Optimizer.

Whenever users are trying to access a broken URL or mistyped the page address, they are immediately redirected to advertisement-filled websites. These domains can be filled with pop-ups, banners, coupons, discounts, in-text links, auto-play videos and similar ads. It goes without saying that this activity dramatically diminishes web browsing activity, as even accidental clicks can lead sites of offensive content. Remove DyFuCa virus from your system, and you will not have to worry about these disturbances anymore.

The secondary component of the adware is the downloader. As soon as the hijack occurs, the malicious application tries to download zx-install.php. Among many others, rogue software such as scareware or even keyloggers^[2] may be downloaded as well. Security experts^[3] warn that these cyber threats can lead to money theft or identity fraud, so users should be aware of DyFuCa spyware dangers.

Additionally, DyFuCa creates various registry entries, including HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run, which allows it to run each time Windows is booted and perform even more malicious tasks. Malware infiltrates Outlook, and it sends out messages to everybody on the address book, urging users to visit sponsored websites or download and install the spyware. This activity is virus-like, as many trojan horses or other malware employs such tactics.

DyFuCa virus also creates the following files inside the Windows folder:

• offun.exe
• tcb.pmw
• srveghcxhp.exe
• ucffhpc.exe
• srvbwfwngw.exe

Stay away from dubious websites and do not accept any questionable licence agreements

Although this program does not enter PC in illegal ways (such as phishing emails or via the exploit kits), it can get installed without users even understanding what has actually happened. Thus, we can't call this type of installation entirely legitimate, either.

When the user gets redirected to certain dubious pages, he or she is asked to enable ActiveX code from MoneyTree. As soon as the user agrees, a license agreement for Internet Optimizer shows up, prompting to accept it. Alternatively, users may be redirected to the web browser page, or to it could display nothing at all. As soon as the user consents to the agreement, Dyfuca is installed on the machine.

Therefore, we advise users to stay away from questionable websites and never agree to run ActiveX, JavaScript or any other script on their device. Instead, ignore the pop-ups and close down the browser.

Remove DyFuCa from your PC using AV engine

As we already mentioned, this spyware program can install plenty of other PUPs on the machine. Therefore, trying to remove DyFuCa virus manually would not succeed, and multiple components still might be left on the system. Furthermore, it could have installed a dangerous trojan or keylogger without your knowledge.

Therefore, we recommend automatic DyFuCa removal. All you have to do is download and install security software. Because the malicious application modifies Windows Registry, we suggest using FortectIntego, as it can correct keys and eliminate all traces of malware.